QUESTION to SAS:  Is my choice of QMARKERS   793 a good choice? Is it too big or too small?                                        Where can I read about these numbers  “7, 25, 105” ?   QMARKERS= number - specifies the default number of markers to use for the P2 quantile estimation method. The number of markers controls the size of fixed memory space.      The default value depends on which quantiles you request. For the median (P50), number is 7. For the quantiles (P25 and P50), number is 25. For the quantiles P1, P5, P10, P75 P90, P95, or P99, number is 105. If you request several quantiles, then PROC MEANS uses the largest value of number. An odd integer greater than 3.       Increase the number of markers above the defaults settings to improve the accuracy of the estimate; reduce the number of markers to conserve memory and computing time.      Additions:  7 + 25 + 25 + 7*105 = 792 -> 793.       ... View more

When I want to compare two or more methods, what is the important? Shall I use USER CPU TIME  or  SYSTEM CPU TIME   ? Shall I use Memory   OR   OS memory? See the text below (provided by options FULLSTIMER) My method will not use a lot of memory – because I do not use sort very much. Cpu time for My method – I do not know quite yet.     My guess:  USER CPU Time and perhaps Memory. See below.        real time           0.02 seconds        user cpu time       0.00 seconds     ß        system cpu time     0.01 seconds ß        memory              7285.46k             ß        OS Memory           35788.00k       ß        Timestamp           2022-05-06 03:51:12 em        Step Count                        478  Switch Count  4        Page Faults                       0        Page Reclaims                     1676        Page Swaps                        0        Voluntary Context Switches        70        Involuntary Context Switches      0        Block Input Operations            0        Block Output Operations           264   ... View more